Heater housing



FIG. 1 is a top perspective view of a heater housing showing our new design;

FIG. 2 is a side elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof; and,

FIG. 6 is a side elevation view thereof opposite from the side shown in FIG. 1.

The bottom view (not shown) forms no part of the claimed design. The subject matter shown in broken lines is for environmental purposes only and forms no part of the claimed design. 

The ornamental design for a heater housing, as shown and described. 